fn greet_world(){
    let sourthern_germany = "helloworld";
    let chinese = "wold_hello";
    let english = "世界你好";
    let regions = [sourthern_germany,chinese,english];
    for region in regions.iter()
    {
        println!("{}",&region);
    }
}
fn variables_test()
{
    let mut x = 8;
    println!("The value of x is {}",x);
    x = 6;
    println!("The value of x is {}",x);
}
fn main() {
    println!("hello world");
    let southern_germany = "groud";
    println!("{}",&southern_germany);
    greet_world();
}